Hub bearing durability testing machine load benchmarking detection method and device

Abstract

The invention relates to the technical field of hub bearings, in particular to a hub bearing durability testing machine load benchmarking detection method and device. The hub bearing durability testing machine load benchmarking detection method comprises the following steps: positioning a bearing on a detection device, and controlling an inner ring unit and an outer ring unit of the bearing to rotate relatively; applying a test load to the bearing by the standard testing machine, detecting standard strain data of the bearing through the strain gauge, and obtaining a first strain data curve of which the strain value is greater than a reference threshold value; and controlling the to-be-tested testing machine to apply a test load to the bearing on the basis that the inner and outer ring units are in a relative rotation state and the standard testing machine stops applying the load, and obtaining a second strain data curve through the same method. And finally comparing the two groups of strain data curves, and calibrating the load data of the testing machine to be tested according to the comparison result. The detection device is applied to the load benchmarking detection method of the bearing durability testing machine, so that the problem of insufficient test reliability of the hub bearing durability testing machine is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of wheel hub bearings, and in particular to a load benchmarking detection method and device for a wheel hub bearing durability testing machine. Background Art

[0002] In the field of wheel hub bearing durability testing, loading testers are key equipment for evaluating product performance and reliability. Among them, although high-precision loading testers can achieve stable loading force control, the cost is too high; although cheap testing machines are low in cost, they generally have problems such as large loading force fluctuations and insufficient stability. The force sensor needs to be frequently disassembled for offline calibration, which leads to longer test cycles and increased operation and maintenance costs.

[0003] However, there are many problems in the detection of loading force stability of durability testing machines in the prior art: First, the stability of the loading force of the durability testing machine cannot be directly detected at present. Usually, only the force sensor on the testing machine can be calibrated, and the force sensor needs to be removed for calibration, which is time-consuming and laborious; second, even if the sensor is calibrated, the output force of the loading mechanism may still drift or overshoot under alternating loads due to the dynamic characteristics of the mechanical system in actual operation. Such dynamic errors cannot be eliminated by offline calibration, which directly affects the credibility of the test data. Finally, as an overall durability testing machine, the different structural rigidity of different equipment, the different rigidity of tooling fixtures, and the loading method of whether it is a replacement tooling or an original tooling are not taken into account. The above factors cause the magnitude of the force to change when the loading force is transmitted to the test bearing. The detected force is not the final force of the test bearing during the test. Therefore, there is an urgent need for a detection method that can detect the loading force online and in situ, and benchmark the precise force of the bearing in real time, so as to determine whether the loading force of a relatively common and inexpensive durability testing machine is accurate after long-term use. Summary of the invention

[0004] In order to solve the problem that the loading force accuracy of a wheel hub bearing durability testing machine is inconvenient to detect, the present invention provides a load benchmarking detection method and device for a wheel hub bearing durability testing machine.

[0005] In a first aspect, the present invention provides a wheel hub bearing durability testing machine load benchmarking detection method, the wheel hub bearing durability testing machine load benchmarking detection method comprising: Step S10, based on the wheel hub bearing being positioned on the detection device, controlling the inner ring unit and the outer ring unit of the wheel hub bearing to rotate relative to each other; the wheel hub bearing comprises the inner ring unit and the outer ring unit; the detection device comprises a strain gauge; when the wheel hub bearing is positioned on the detection device, the axis of the wheel hub bearing is horizontally arranged, and the strain gauge is attached to the wheel hub bearing; Step S20, based on the inner ring unit and the outer ring unit being in a relative rotation state, controlling a standard testing machine to apply a test load to the wheel hub bearing; the test load includes multiple loads in different directions arranged in a time sequence; Step S30, applying the test load to the wheel hub bearing based on the standard testing machine, and detecting standard strain data of the wheel hub bearing through the strain gauge; Step S40, based on the completion of the detection of the standard strain data, obtaining a first strain data curve in which the strain value in the standard strain data is greater than a reference threshold; Step S50, based on the inner ring unit and the outer ring unit being in a relative rotation state and the standard testing machine stopping applying the load, controlling the testing machine to be tested to apply the test load to the wheel hub bearing; Step S60, applying the test load to the wheel hub bearing based on the testing machine to be tested, and detecting the test strain data of the wheel hub bearing through the strain gauge; Step S70, based on the completion of the test strain data detection, a second strain data curve in the test strain data is obtained; the load data at both ends of the second strain data curve corresponds to the load data at both ends of the first strain data curve; Step S80, comparing the first strain data curve with the second strain data curve, and calibrating the load data of the test machine to be tested according to the comparison result.

[0006] In some embodiments, the step S10 includes: based on the completion of positioning of the wheel hub bearing on the detection device, controlling the inner ring unit of the wheel hub bearing to rotate, and controlling the outer ring unit of the wheel hub bearing to remain stationary; the wheel hub bearing includes the inner ring unit and the outer ring unit; the inner ring unit is at least partially located inside the outer ring unit; the inner ring unit is rotatably connected to the outer ring unit; the detection device includes a strain gauge; when the wheel hub bearing is positioned on the detection device, the axis of the wheel hub bearing is horizontally arranged, and the strain gauge is attached to the outer circumferential surface of the outer ring unit.

[0007] In some embodiments, the detection device further includes a rotating unit and a loading unit; In the step S10, when the hub bearing is positioned on the detection device, the rotating unit is detachably connected to the inner ring unit, and the loading unit is detachably connected to the outer ring unit; The step S20 includes: based on the inner ring unit and the outer ring unit being in a relative rotation state, controlling the standard testing machine to apply a test load to the loading unit; the test load includes multiple loads in different directions arranged in a time sequence.

[0008] In some embodiments, the loading unit includes a loading connection plate and a loading force arm; the loading connection plate and the loading force arm are detachably connected; one end of the loading force arm is a loading end; the loading end is used to connect to a standard testing machine or a testing machine to be tested; In the step S10, when the wheel hub bearing is positioned on the detection device, the load-bearing end is located directly below the wheel hub bearing, and there is a distance between the load-bearing end and the wheel hub bearing.

[0009] In some embodiments, the strain gauge is located at the top end of the outer ring unit, or the strain gauge is located at the bottom end of the outer ring unit.

[0010] In some embodiments, the test load includes at least two of a first load, a second load, a third load, a fourth load, a fifth load and a sixth load; the first load is a first vertical force; the first vertical force is set upward; the second load is a first horizontal force; under the action of the first horizontal force, the outer ring unit has a tendency to separate from the inner ring unit; the third load is the resultant force of the first vertical force and the first horizontal force; the fourth load is a second vertical force; the second vertical force is set downward; the fifth load is a second horizontal force; the second horizontal force is opposite to the first horizontal force; the sixth load is the resultant force of the second vertical force and the second horizontal force.

[0011] In some embodiments, the test load further includes a seventh load; the seventh load is the resultant force of the first vertical force and the second vertical force; When the outer ring unit is subjected to the first load, the second load, the third load, the fourth load, the fifth load and the sixth load in sequence, the rotation speed of the inner ring unit is the test rotation speed; When the outer ring unit is subjected to the seventh load, the rotation speed of the inner ring unit gradually changes in a time sequence within a preset rotation speed range.

[0012] In some embodiments, the test rotational speed is within the preset rotational speed range; the test rotational speed is less than a middle value of the preset rotational speed range.

[0013] In some embodiments, the test load includes the third load, the second load, the first load, the sixth load, the fifth load, and the third load arranged in time sequence.

[0014] In a second aspect, the present invention provides a detection device, which is applied to the load benchmarking detection method of the wheel hub bearing durability testing machine in the first aspect, and the detection device comprises: Strain gauges; A rotating unit, the rotating unit comprising a rotating connection disk and a rotating driving part; the rotating driving part is detachably connected to the rotating connection disk; the rotating driving part controls the rotation of the rotating connection disk; the rotating connection disk is used to be detachably connected to the inner ring unit of the hub bearing; A loading unit, the loading unit comprising a loading connection plate and a loading force arm; the loading connection plate is detachably connected to the loading force arm; the loading connection plate is used to be detachably connected to the outer ring unit of the hub bearing; one end of the loading force arm is a loading end; the loading end is used to connect to a standard testing machine or a testing machine to be tested; there is a distance between the loading end and the loading connection plate; A controller, wherein the controller is electrically connected to the strain gauge and the rotation drive unit respectively; the controller is also used to be electrically connected to the standard testing machine and the testing machine to be tested.

[0015] In order to solve the problem of insufficient test reliability of the wheel hub bearing durability testing machine, the present invention has the following advantages: The present invention greatly improves the bearing strain detection method. By pasting strain gauges on the wheel hub bearing to monitor the strain data under different load forces in real time, it not only simplifies the structure and test steps of the endurance test machine, but also greatly improves the accuracy of the wheel hub bearing strain data. During the detection process, directly monitoring the load conditions of the bearing can eliminate the errors caused by different fixtures connected to the bearing. In addition, the stability of the loading force and whether there is overshoot during the load alternation process can be detected in real time, thereby determining the stability of the loading unit of the test machine to be tested, making the test process more stable and the test results more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic flow chart of a load benchmarking detection method for a wheel hub bearing durability testing machine according to an embodiment is shown; Figure 2 A schematic structural diagram of a load benchmarking detection device for a wheel hub bearing durability testing machine according to an embodiment is shown; Figure 3 Shows Figure 2 Schematic diagram of the hub bearing in the illustrated embodiment.

[0017] Figure numerals: 10 strain gauge; 20 rotating unit; 21 rotating connecting disk; 30 loading unit; 31 loading connecting disk; 32 loading force arm; 40 controller; 50 wheel hub bearing; 51 bearing outer ring; 52 bearing inner ring. DETAILED DESCRIPTION

[0018] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, rather than implying any limitation on the scope of the present disclosure.

[0019] As used herein, the term "including" and its variants are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "based at least in part on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal" and the like is based on the orientation or position relationship shown in the accompanying drawings. These terms are mainly for better describing the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation. In addition, in addition to being used to indicate an orientation or position relationship, some of the above terms may also be used to indicate other meanings, such as the term "upper" may also be used to indicate a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to the specific circumstances. In addition, the terms "install", "set", "provided with", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be an internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances. In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0020] The durability test of the wheel hub bearing 50 is usually carried out through a durability testing machine, but high-precision durability testing machines are expensive, and cheap durability testing machines have unstable loading and need regular calibration. In the prior art, the loading force of the durability testing machine cannot be directly detected, and usually the sensor on the durability testing machine can only be removed and sent for inspection separately, which is time-consuming and labor-intensive. In addition, during the sensor calibration process, the stability of the loading force of the durability testing machine cannot be detected; and considering factors such as changes in tooling fixtures and loading methods, the force transmitted to the test bearing by the loading force will change, resulting in the detection force not being the final force when the test bearing is tested, which directly affects the credibility of the test data. Therefore, in this embodiment, a load benchmarking detection method for a wheel hub bearing 50 durability testing machine is provided, such as Figure 1 As shown, the wheel hub bearing 50 endurance testing machine load benchmarking detection method may include steps S10 to S80, and each step is described in detail as follows: Step S10, based on the wheel hub bearing 50 being positioned on the detection device, the inner ring unit and the outer ring unit of the wheel hub bearing 50 are controlled to rotate relative to each other. The wheel hub bearing 50 includes an inner ring unit and an outer ring unit; the detection device includes a strain gauge 10. When the wheel hub bearing 50 is positioned on the detection device, the axis of the wheel hub bearing 50 is horizontally set, that is, the posture of the wheel hub bearing 50 is consistent with the direction setting when it is actually used on the vehicle; the strain gauge 10 is attached to the wheel hub bearing 50, so that the strain change on the surface of the wheel hub bearing 50 can be directly detected by the strain gauge 10, thereby real-time detection of the strain of the wheel hub bearing 50 during the test process.

[0021] It should be understood that in some embodiments, the inner ring unit can be driven to rotate and the outer ring unit can be controlled to be stationary; in some embodiments, the outer ring unit can be driven to rotate and the inner ring unit can be controlled to be stationary; in some embodiments, the outer ring unit and the inner ring unit can be driven to rotate differentially.

[0022] Step S20, based on the inner ring unit and the outer ring unit being in a relative rotation state, control the standard testing machine to apply a test load to the hub bearing 50. The standard testing machine may be a high-precision endurance testing machine. The test load may include loads in various directions arranged in a time sequence, simulating loads in various directions that may exist in the actual working conditions of the vehicle as much as possible.

[0023] Step S30 , applying a test load to the wheel hub bearing 50 based on a standard testing machine, and detecting standard strain data of the wheel hub bearing 50 through the strain gauge 10 .

[0024] Step S40, based on the completion of the standard strain data detection, obtain the first strain data curve in which the strain value in the standard strain data is greater than the reference threshold. That is, the first strain data curve is a set of data with the largest strain value of the hub bearing 50, thereby improving the accuracy of calibration.

[0025] Step S50, based on the inner ring unit and the outer ring unit being in a relative rotation state and the standard testing machine stopping applying load, controlling the testing machine to be tested to apply a test load to the hub bearing 50. The testing machine to be tested may be a common durability testing machine with a relatively low price.

[0026] Step S60 , applying a test load to the wheel hub bearing 50 based on the testing machine to be tested, and detecting the test strain data of the wheel hub bearing 50 through the strain gauge 10 .

[0027] Step S70, based on the completion of the test strain data detection, obtain a second strain data curve in the test strain data. The load data at both ends of the second strain data curve corresponds to the load data at both ends of the first strain data curve, that is, the first strain data curve and the second strain data curve to be compared are data measured when the same load is applied on different endurance testing machines.

[0028] Step S80, compare the first strain data curve with the second strain data curve, and calibrate the load data of the test machine to be tested according to the comparison result. The first strain data curve can be regarded as the accurate strain amount of the measured wheel hub bearing 50. By comparing the first strain data curve with the second strain data curve, the test machine to be tested can be calibrated according to the value of the second strain data curve deviating from the first strain data curve.

[0029] Compared with detecting strain data through sensors, the use of strain gauges 10 can not only take into account factors such as the tooling fixture connected to the hub bearing 50 and more realistically reflect the actual load conditions of the test bearing, but also simplify the structure and detection process, saving time and effort.

[0030] In this embodiment, preferably, step S10 may include: based on the hub bearing 50 being positioned on the detection device, controlling the inner ring unit of the hub bearing 50 to rotate and controlling the outer ring unit of the hub bearing 50 to remain stationary. Figure 2 As shown, the wheel hub bearing 50 includes an inner ring unit and an outer ring unit, and the inner ring unit is at least partially located inside the outer ring unit; the inner ring unit is rotatably connected to the outer ring unit; and the detection device includes a strain gauge 10. When the wheel hub bearing 50 is positioned on the detection device, the axis of the wheel hub bearing 50 is horizontally arranged, which is consistent with the actual working position of the wheel hub bearing 50 on the vehicle, so that the actual working conditions can be simulated as much as possible during the detection process, so that the durability of the measured wheel hub bearing 50 is more reliable; the strain gauge 10 can be attached to the outer circumferential surface of the stationary outer ring unit. On the one hand, it is more convenient to load and unload when attached to the outermost side of the wheel hub bearing 50, and on the other hand, the strain gauge 10 needs to have a signal line lead-out, and attaching it to the stationary part of the wheel hub bearing 50 can prevent the signal line from being entangled and knotted.

[0031] In this embodiment, if Figure 2As shown, the detection device further includes a rotating unit 20 and a loading unit 30 .

[0032] In step S10, when the hub bearing 50 is positioned on the detection device, the rotating unit 20 is detachably connected to the inner ring unit, and the loading unit 30 is detachably connected to the outer ring unit. The rotating unit 20 can control the rotation speed of the inner ring unit, thereby testing the change of the strain of the hub bearing 50 at different rotation speeds. The loading unit 30 can apply loads of different sizes or directions to the outer ring unit, thereby testing the change of the strain of the hub bearing 50 under different loads.

[0033] Step S20 may include: based on the inner ring unit and the outer ring unit being in a relative rotation state, controlling the standard testing machine to apply a test load to the loading unit 30. The test load may include loads in multiple directions arranged in a time sequence, so that the measured first strain data curve may include strain data when the hub bearing 50 is subjected to loads in different directions.

[0034] In this embodiment, if Figure 2 As shown, the loading unit 30 may include a loading connection plate 31 and a loading arm 32, and the loading connection plate 31 and the loading arm 32 are detachably connected. One end of the loading arm 32 is a load-bearing end, and the load-bearing end is used to connect a standard testing machine or a testing machine to be tested. The load on the load-bearing end can act on the wheel hub bearing 50 through the loading arm 32.

[0035] In step S10, when the wheel hub bearing 50 is positioned on the detection device, the load-bearing end is located directly below the wheel hub bearing 50, and there is a distance between the load-bearing end and the wheel hub bearing 50. The distance can be equal to the distance between the bottom of the automobile wheel and the wheel hub bearing 50, so that the load transmitted from the load-bearing end to the wheel hub bearing 50 can be close to the load that the wheel hub bearing 50 is borne under actual working conditions on the automobile.

[0036] In this embodiment, if Figure 3 As shown, the strain gauge 10 can be located at the top of the outer ring unit, or the strain gauge 10 can be located at the bottom of the outer ring unit. The top and bottom of the outer ring unit are the positions where the strain amount is the largest when the outer ring unit is subjected to a vertical load. The data measured by setting the strain gauge 10 at the position where the strain amount is the largest can more accurately reflect the durability of the hub bearing 50.

[0037] It should be understood that in some embodiments, the strain gauge 10 may also be located at any position on the outer peripheral wall of the outer ring unit. In some embodiments, there may be multiple strain gauges 10 distributed at the top and bottom of the outer ring unit.

[0038] In this embodiment, the test load may include at least two of the first load, the second load, the third load, the fourth load, the fifth load and the sixth load. The first load may be a first vertical force, which is set upward to simulate the support force of the ground on the wheel. The second load is a first horizontal force, under the action of the first horizontal force, the outer ring unit has a tendency to separate from the inner ring unit, and the first horizontal force simulates the horizontal friction force of the ground on the wheel when the vehicle is running. The third load is the resultant force of the first vertical force and the first horizontal force. The fourth load is a second vertical force, which is set downward to simulate the pressure of the vehicle body on the wheel. The fifth load is a second horizontal force, which is opposite to the first horizontal force in direction, and the second horizontal force simulates the horizontal friction force of the ground on the wheel when the vehicle is running. The sixth load is the resultant force of the second vertical force and the second horizontal force. Testing loads in six different directions and simulating various situations that may occur in the actual working conditions of the hub bearing 50 as much as possible can make the test results more reliable.

[0039] In this embodiment, the test load may further include a seventh load, which is a resultant force of the first vertical force and the second vertical force.

[0040] When the outer ring unit is subjected to the first load, the second load, the third load, the fourth load, the fifth load and the sixth load in sequence, the rotation speed of the inner ring unit is the test speed. At this time, what is measured in sequence is the strain of the hub bearing 50 when it is subjected to loads in different directions under the condition of constant rotation speed.

[0041] When the outer ring unit is subjected to the seventh load, the rotation speed of the inner ring unit gradually changes in a time sequence within a preset rotation speed range. At this time, what is measured in sequence in a time sequence is the strain of the hub bearing 50 at different rotation speeds when subjected to a constant radial load.

[0042] By controlling different quantities and variables, we can obtain as much and comprehensive experimental data as possible, making the experiment more reliable.

[0043] In this embodiment, the test speed can be within the preset speed range. The test speed can be less than the middle value of the preset speed range, so as to avoid the error of the force on the hub bearing 50 caused by the higher speed. In addition, the horizontal friction force is larger and the speed is lower when the wheel is turning. Therefore, when the hub bearing 50 is subjected to the horizontal load, the test speed can be lowered, which is more in line with the actual working conditions and makes the data measured by the strain gauge 10 more accurate.

[0044] In this embodiment, the test load may include a third load, a second load, a first load, a sixth load, a fifth load and a fourth load arranged in a time sequence. The third load and the sixth load are two opposite forces in an oblique direction, the second load and the fifth load are two opposite forces in a horizontal direction, and the first load and the fourth load are two opposite forces in a vertical direction. By moving each two loads in the three groups of loads away from each other in a time sequence during the test process, the possibility of overshoot can be reduced, the test curve can be avoided from being destroyed during the splitting, and the complete large deformation data can be retained as much as possible.

[0045] In this embodiment, if Figure 2 As shown, the detection device includes a strain gauge 10 , a rotating unit 20 , a loading unit 30 and a controller 40 .

[0046] The rotating unit 20 may include a rotating connection disk 21 and a rotating driving part, and the rotating driving part is detachably connected to the rotating connection disk 21. The rotating driving part can control the rotating connection disk 21 to rotate, and the rotating connection disk 21 is used to be detachably connected to the inner ring unit of the hub bearing 50, so that the rotating unit 20 can control the inner ring unit of the hub bearing 50 to rotate.

[0047] The loading unit 30 may include a loading connection plate 31 and a loading arm 32, and the loading connection plate 31 is detachably connected to the loading arm 32. The loading connection plate 31 is used to be detachably connected to the outer ring unit of the hub bearing 50. One end of the loading arm 32 is a load-bearing end, and the load-bearing end is used to connect a standard testing machine or a testing machine to be tested. There is a spacing between the load-bearing end and the loading connection plate 31, and the spacing can be the same as the distance between the bottom of the automobile wheel and the hub bearing 50, so that the load transmitted from the load-bearing end to the hub bearing 50 can be close to the load that the hub bearing 50 is subjected to under actual working conditions on the automobile.

[0048] The controller 40 is electrically connected to the strain gauge 10 and the rotation drive unit respectively. The controller 40 is also used to be electrically connected to the standard testing machine and the test machine to be tested. Therefore, the controller 40 controls the rotation speed of the inner ring unit of the wheel hub bearing 50 and the load capacity of the outer ring unit by controlling the rotation drive unit and the standard testing machine and the test machine to be tested, and at the same time detects the strain data of the wheel hub bearing 50 through the strain gauge 10.

[0049] It should be understood that the “present embodiment” mentioned in the present invention is based on the technical points currently described, and multiple “present embodiments” may be the same embodiment or different embodiments.

[0050] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present disclosure, and in actual applications, various changes may be made thereto in form and detail without departing from the scope of the present disclosure.

Claims

1. A load benchmarking detection method for a wheel hub bearing durability testing machine, characterized in that: The wheel hub bearing durability testing machine load benchmarking detection method comprises: Step S10, based on the wheel hub bearing being positioned on the detection device, controlling the inner ring unit and the outer ring unit of the wheel hub bearing to rotate relative to each other; the wheel hub bearing comprises the inner ring unit and the outer ring unit; the detection device comprises a strain gauge; when the wheel hub bearing is positioned on the detection device, the axis of the wheel hub bearing is horizontally arranged, and the strain gauge is attached to the wheel hub bearing; Step S20, based on the inner ring unit and the outer ring unit being in a relative rotation state, controlling a standard testing machine to apply a test load to the wheel hub bearing; the test load includes multiple loads in different directions arranged in a time sequence; Step S30, applying the test load to the wheel hub bearing based on the standard testing machine, and detecting standard strain data of the wheel hub bearing through the strain gauge; Step S40, based on the completion of the detection of the standard strain data, obtaining a first strain data curve in which the strain value in the standard strain data is greater than a reference threshold; Step S50, based on the inner ring unit and the outer ring unit being in a relative rotation state and the standard testing machine stopping applying the load, controlling the testing machine to be tested to apply the test load to the wheel hub bearing; Step S60, applying the test load to the wheel hub bearing based on the testing machine to be tested, and detecting the test strain data of the wheel hub bearing through the strain gauge; Step S70, based on the completion of the test strain data detection, obtaining a second strain data curve in the test strain data; the load data at both ends of the second strain data curve corresponds to the load data at both ends of the first strain data curve; Step S80, comparing the first strain data curve with the second strain data curve, and calibrating the load data of the test machine to be tested according to the comparison result.

2. A wheel hub bearing durability testing machine load benchmarking detection method according to claim 1, characterized in that: The step S10 includes: based on the completion of positioning of the wheel hub bearing on the detection device, controlling the inner ring unit of the wheel hub bearing to rotate and controlling the outer ring unit of the wheel hub bearing to remain stationary; the wheel hub bearing includes the inner ring unit and the outer ring unit; the inner ring unit is at least partially located inside the outer ring unit; the inner ring unit is rotatably connected to the outer ring unit; the detection device includes a strain gauge; when the wheel hub bearing is positioned on the detection device, the axis of the wheel hub bearing is horizontally arranged, and the strain gauge is attached to the outer circumferential surface of the outer ring unit.

3. The method for detecting the load benchmark of a wheel hub bearing durability testing machine according to claim 2, characterized in that: The detection device also includes a rotating unit and a loading unit; In the step S10, when the hub bearing is positioned on the detection device, the rotating unit is detachably connected to the inner ring unit, and the loading unit is detachably connected to the outer ring unit; The step S20 includes: based on the inner ring unit and the outer ring unit being in a relative rotation state, controlling the standard testing machine to apply a test load to the loading unit; the test load includes multiple loads in different directions arranged in a time sequence.

4. A wheel hub bearing durability testing machine load benchmarking detection method according to claim 3, characterized in that: The loading unit comprises a loading connection plate and a loading force arm; the loading connection plate and the loading force arm are detachably connected; one end of the loading force arm is a loading end; the loading end is used to connect a standard testing machine or a testing machine to be tested; In the step S10, when the wheel hub bearing is positioned on the detection device, the load-bearing end is located directly below the wheel hub bearing, and there is a distance between the load-bearing end and the wheel hub bearing.

5. The method for detecting load benchmarking of a wheel hub bearing durability testing machine according to claim 4, characterized in that: The strain gauge is located at the top end of the outer ring unit, or the strain gauge is located at the bottom end of the outer ring unit.

6. A wheel hub bearing endurance testing machine load benchmarking detection method according to claim 5, characterized in that: The test load includes at least two of a first load, a second load, a third load, a fourth load, a fifth load and a sixth load; the first load is a first vertical force; the first vertical force is set upward; the second load is a first horizontal force; under the action of the first horizontal force, the outer ring unit has a tendency to separate from the inner ring unit; the third load is a resultant force of the first vertical force and the first horizontal force; the fourth load is a second vertical force; The second vertical force is set downward; the fifth load is a second horizontal force; The second horizontal force is in opposite direction to the first horizontal force; and the sixth load is the resultant force of the second vertical force and the second horizontal force.

7. A wheel hub bearing endurance testing machine load benchmarking detection method according to claim 6, characterized in that: The test load also includes a seventh load; the seventh load is the resultant force of the first vertical force and the second vertical force; When the outer ring unit is subjected to the first load, the second load, the third load, the fourth load, the fifth load and the sixth load in sequence, the rotation speed of the inner ring unit is the test rotation speed; When the outer ring unit is subjected to the seventh load, the rotation speed of the inner ring unit gradually changes in a time sequence within a preset rotation speed range.

8. The load benchmarking detection method for a wheel hub bearing durability testing machine according to claim 7, characterized in that: The test speed is within the preset speed range; the test speed is less than a middle value of the preset speed range.

9. The method for detecting load benchmarking of a wheel hub bearing durability testing machine according to claim 6, characterized in that: The test load includes the third load, the second load, the first load, the sixth load, the fifth load, and the third load arranged in time sequence.

10. A wheel hub bearing endurance testing machine load benchmarking detection device, applied to the wheel hub bearing endurance testing machine load benchmarking detection method according to any one of claims 1 to 9, characterized in that: The detection device comprises: Strain gauges; A rotating unit, the rotating unit comprising a rotating connection disk and a rotating driving part; the rotating driving part is detachably connected to the rotating connection disk; the rotating driving part controls the rotation of the rotating connection disk; the rotating connection disk is used to be detachably connected to the inner ring unit of the hub bearing; A loading unit, the loading unit comprising a loading connection plate and a loading force arm; the loading connection plate is detachably connected to the loading force arm; the loading connection plate is used to be detachably connected to the outer ring unit of the hub bearing; one end of the loading force arm is a loading end; the loading end is used to connect to a standard testing machine or a testing machine to be tested; there is a distance between the loading end and the loading connection plate; A controller, wherein the controller is electrically connected to the strain gauge and the rotation drive unit respectively; the controller is also used to be electrically connected to the standard testing machine and the testing machine to be tested.

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